Our amazing Ecotric Folding Electric Bike feratures both "Pedal Assist" and "Throttle Only" modes, and can reach speeds of up to 20 mph. Its light weight makes it easy to handle. Equipped with comfortable yet compact 20" x 4" Fat Tires. Also equipped with popular "SHIMANO Acera 7 Gear" mechanism and Dual Disc Brakes for a smooth, efficient and dependable ride. It's powerful 36v 12AH Lithium Cell battery and 500 Watt Rear Hub Motor will take you up to 45 miles on a single charge. It rolls comfortably over all types of terrain, including sand, beach, dirt, mud, snow and of course normal road conditions with ease ... thanks to its beefy 4" Fat Knobby Tires. It can be conveniently folded in order to store and transport very easily.